Docker My Note

In this tutorial, I am written Docker my note. Docker the essential for DevOps Roles.

Cannot connect to the Docker daemon. Is the docker daemon running on this host?

Solve the problem: Add this user to the docker group.

Detach and Attach

  • Detach : Ctrl-p + Ctrl-q
  • Attach : docker attach [container]

Why can not detach?

Solve the problem: docker run with “-i”, “-t” options. http://stackoverflow.com/questions/20145717/how-to-detach-from-a-docker-container

Docker run without -it, but attach, so can not type CTRL-C

Close your terminal! Anything OK.

To safe detach…

Docker run without “-i”, “-t” option. But you want to detach, if you hit Ctrl-C then docker process be killed.
To avoid it, attach with

--sig-proxy=false

You want to log in a container…

docker exec -it [container-name] /bin/bash

start on os-startup

docker command

 --restart=always

docker compose add restart: always in docker-compose.yaml file

search a docker image in hub.docker.com

docker search nginx

Download a docker image from hub.docker.com

docker image pull <image_name>:<image_version/tag>

List out docker images from your local system

docker image ls

Expose your application to host server

docker run -d -p <host_port>:<container_port> --name <container_Name> <image_name>:<Image_version/tag>

List out running containers

docker ps

List out all docker container (running, stpooed, terminated, etc…)

docker ps -a

Stop/Start a container

docker stop <container_id>

docker start <container_id>

Remove a container

docker rm <container_id>

About HuuPV

My name is Huu. I love technology and especially Devops Skill such as Docker, vagrant, git so forth. I likes open-sources. so I created DevopsRoles.com site to share the knowledge that I have learned. My Job: IT system administrator. Hobbies: summoners war game, gossip.
View all posts by HuuPV →

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